The present research used cocoa mesocarp (chocolate production residue) as a precursor material of charcoal. This residue was subjected to temperatures of 500°C, 600°C and 700°C for times of 30, 60 and 90 minutes. Charcoals obtained were ground and classified according to their particle diameter in fine and coarse. Subsequently, the adsorption capacity of each treatment with oxalic acid (C2 H2 O4 ) was evaluated to determine the optimum charcoal to be used as a blank. According to results, 600°C60'F treatment showed the best adsorption capacity. This one was subjected to ultrasound at 20kHz at different wave amplitudes (20 % and 40 %) as well as exposure times of 5, 10 and 20 minutes. Evaluation was compared to blank through physicochemical parameters such as chemical kinetics and equilibrium, isotherms of adsorption of C2 H2 O4 , and estimation of the adsorption surface. Finally, re...

Generation of waste is one of the main problems faced by the agroindustry due to the inadequate management and treatment given. Therefore, it is vital to look for alternatives for the use of waste that can generate added value. The aim of the research was to determine the competence of the episperm lucuma seed (ELS) in the elaboration of activated carbon (AC).  was used as activating agent at two impregnation ratios (0.2 and 0.4g/g episperm) at three temperatures (600, 700 and 800 °C) and three carbonization times (15, 30 and 45 min). 18 treatments were obtained. Methylene blue (MB) dye was used as adsorbate. Chemical kinetics, adsorption capacity and adsorption isotherms of the MB-AC system were studied. The adsorption surface area was determined by the BET isotherm with gaseous nitrogen, the functional groups and morphology of CA were characterized by infrared spectroscopy and scanni...

Universidad Nacional Agraria La Molina. Escuela de Posgrado. Maestría en Ciencias Ambientales